Accelerated video on MV3DT

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Please provide complete information as applicable to your setup.

• Hardware Platform (Jetson / GPU): RTX 4090
• DeepStream Version: 9.0
• JetPack Version (valid for Jetson only): N/A
• TensorRT Version: 11.0.0.114-1+cuda13.2
• NVIDIA GPU Driver Version (valid for GPU only): 595.71.05
• Issue Type( questions, new requirements, bugs): bug
• How to reproduce the issue ? (This is for bugs. Including which sample app is using, the configuration files content, the command line used and other details for reproducing)
**• Requirement details( This is for new requirement. Including the module name-for which plugin or for which sample application, the function description)

I have 2 videos of 3 people walking around a room, which I used on AutoMagicCalib to get the calibration. AMC did not work but vggt got a good estimate for my cameras position.**

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image312×510 12.2 KB

When I use the same videos on MV3DT, one of the videos is accelerated in comparison to the other one and I never get any position being drawn on BEV.

Why the video gets accelerated?

3

What is the question? Are you setup MV3DT based on the guide here: deepstream_reference_apps/deepstream-tracker-3d-multi-view at master · NVIDIA-AI-IOT/deepstream_reference_apps · GitHub?

4

I recorded the videos and used them for calibration.
When I open the videos on VLC, they run at normal speed.
I used a slightly modified ./scripts/test_4cam_ds.sh script, but with the path for my 2 videos and the calibration data.
One of them gets highly accelerated when I run the script.
Why is this happening?

5

Can you share some video to show the issue? You can use private message if you don’t want to public the videos.

6

Hi kesong,

The videos are in the links below.

cam10_20260616_142246.mp4

cam12_20260616_142246.mp4

7

Can you record video to show this issue? Do you mean one of the video playback faster then normal speed?

8

Here I am running MV3DT with both videos.
Both videos playback is faster then normal speed, but one of them is even faster and it ends before the other, which interrupts the execution at the end.
BEV shows nothing.

2026-06-24 11-29-17.mp4

I also attached the script that I used to run as a txt

test_2cam_ds.txt (2.2 KB)

9

Can you also share the calibration data?

10

Those calibration files were made using the Nvidia AutoMagicCalibration tool.

camInfo_00.txt (348 Bytes)

map
map895×1446 16.5 KB

transforms.txt (337 Bytes)

camInfo_01.txt (349 Bytes)

11

As you changed the input video from 4 to 2, suppose all the configure file batch size should change from 4 to 2. Can you share all the configure file(deepstream config/PGIE config/tracker config)

12

I checked your shared video. One video is 30fps, another video is about 21fps. Please use the same fps video,such as 30fps. If you want to playback with normal speed, please set the sync to 1 in: deepstream_reference_apps/deepstream-tracker-3d-multi-view/config_templates/config_deepstream.txt at master · NVIDIA-AI-IOT/deepstream_reference_apps · GitHub

13

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks.